One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(13,14,19,16)(15,22,25,28)(17,21,18,26)(20,27,23,24)(5,6)(7,10)(8,9)(11,12)(13,15,17,27,19,25,18,24)(14,20,26,28,16,23,21,22)(1,2,3,4)(6,9)(10,12)(14,16)(20,23)(21,26)(22,28)(5,7)(6,10)(8,11)(9,12)(13,16,19,14)(15,23,25,20)(17,21,18,26)(22,24,28,27)(7,11)(10,12)(13,17,19,18)(14,21,16,26)(15,24,25,27)(20,28,23,22)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.